| Years | Country | % Correct |
|---|---|---|
| 1951-19552020- | United Kingdom | 100%
|
| 1981- | Albania | 95%
|
| 1981-2007 | Bulgaria | 95%
|
| 1981- | Turkey | 95%
|
| 1951- | Switzerland | 94%
|
| 1951- | Andorra | 93%
|
| 2004-2013 | Croatia | 93%
|
| 1995- | Liechtenstein | 93%
|
| 1995- | Norway | 93%
|
| 2004-2007 | Romania | 93%
|
| 1995-2004 | Hungary | 92%
|
| 1995- | Russia | 92%
|
| 2004- | Serbia | 92%
|
| 2004- | Ukraine | 92%
|
| 1951- | Vatican City | 92%
|
| 1951- | San Marino | 91%
|
| 1991-2004 | Slovenia | 91%
|
| 2013- | Bosnia and Herzegovina | 90%
|
| 1993-2004 | Czech Republic | 90%
|
| 1951-1986 | Spain | 90%
|
| 2004- | Belarus | 89%
|
| 1990-2004 | Poland | 89%
|
| 1991- | North Macedonia | 88%
|
| 1955-2004 | Slovakia | 87%
|
| 2013- | Montenegro | 86%
|
| 1955-1995 | Austria | 85%
|
| 1951-1973 | Denmark | 85%
|
| 2007- | Moldova | 85%
|
| 1956-19621986- | Morocco | 84%
|
| 1951- | Monaco | 83%
|
| 1991-1995 | Soviet Union | 82%
|
| 1951-1991 | Yugoslavia | 82%
|
| 1951-1990 | East Germany | 81%
|
| 1951-1993 | Czechoslovakia | 80%
|
| 1951- | Brazil | 69%
|
| 1975- | Suriname | 65%
|
| 1951-1955 | United States | 61%
|
| 1956-1962 | Tunisia | 52%
|
| 1960-1962 | Mali | 47%
|
| 1960-1960 | Mali Federation | 47%
|
| 1960-1962 | Mauritania | 46%
|
| 1960-1962 | Niger | 46%
|
| 1957-1962 | Libya | 41%
|